Gay-Lussac's Law

By Sydney Maher


The molecules in gases are in constant motion and exert pressure when they hit the container they are in. The velocity and number of collisions of the molecules is determined by the temperature of the gas when it is increased or decreased. In this lab, we studied the relationship between temperature of the gas and the pressure it gives.


1. Put on glasses (and of course wear them).

2. Prepare ice-water, room water, and hot water baths.

3. Prepare a temperature probe and gas pressure sensor for data collection.

4. Prepare Logger Pro.

5. Collect pressure vs. temperature data for gas sample (First cold water, than room temperature water, and than hot water).

6. When finished with collecting data, click stop.

7. Examine the graph.


  • When the beaker was put into the cold water, it was more difficult to sink. Although, when the beaker was placed in the hot water it was way easier to push it to the bottom.
  • I noticed as the pressure increased, so did the temperature.
  • I also noticed in the data that when the pressure and temperature increased, the constant increased as well.


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Big image


While doing this lab, I discovered the relationship between pressure and temperature was a direct relationship because as the temperature increases so does the pressure.